Geometric Phase Approach to Dielectricity Based on the Born-Oppenheimer Approximation  

作　　者：WANG Zheng-chuan LI Bo-zang 王正川;李伯臧(Institute of Physics and Center for Condensed Matter Physics,Chinese Academy of Sciences,Beijing 100080)

机构地区：[1]Institute of Physics and Center for Condensed Matter Physics,Chinese Academy of Sciences,Beijing 100080

出　　处：《Chinese Physics Letters》1999年第10期703-705,共3页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No.19677101.

摘　　要：Macroscopic polarization differences in crystal dielectrics have been accurately treated by certain authors using the geometric phase approach.However,in their treatments the explicit meaning of the slowly varying parameters was not explored.In this paper we restudy the problem under the Born-Oppenheimer approximation.It turns out that the coordinates of nuclei in the system can be taken as the slowly varying parameters.In addition,our treatment is no longer restricted to the case of null electric held.

关 键 词：APPROXIMATION COORDINATES TURNS 

分 类 号：O57[理学—粒子物理与原子核物理]